This is a commentary of game four from the Google DeepMind Challenge Match.
After Lee lost the first three games, his chance of winning the five game match had evaporated.
His revised goal, and the hope of millions of his fans, was that he might succeed in winning at least one game against the machine before the match concluded.
AlphaGo vs Lee Sedol – Game 4 of 5
Game record with variations
Lee Sedol has won 14 world titles in his career, and was challenged by DeepMind because he has been the best Go player in the world over the last decade.
AlphaGo is an artificial intelligence which was developed by Google DeepMind.
In a previous match, AlphaGo defeated Fan Hui 2p 5–0, in October, 2015.
This is an historic match in Go, and it’s the first time that a computer program has challenged a human Go champion in an even game.
This video was recorded at the Sydney Go club in Sydney, Australia.